From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: One idea to free up page flags on NUMA Date: Sat, 23 Sep 2006 20:43:10 +0200 References: <200609231804.40348.ak@suse.de> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200609232043.10434.ak@suse.de> Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: linux-mm@kvack.org, haveblue@us.ibm.com List-ID: On Saturday 23 September 2006 18:39, Christoph Lameter wrote: > On Sat, 23 Sep 2006, Andi Kleen wrote: > > > And what would we use them for? > > Maybe a container number? > > Anyways the scheme also would reduce the number of lookups needed and > thus the general footprint of the VM using sparse. So far most users (distributions) are not using sparse yet anyways. > I just looked at the arch code for i386 and x86_64 and it seems that both > already have page tables for all of memory. i386 doesn't map all of memory. > It seems that a virtual memmap > like this would just eliminate sparse overhead and not add any additional > page table overhead. You would have new mappings with new overhead, no? -Andi -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org